North & Central America

This archive covers progress stories from North and Central America, spanning the U.S., Canada, Mexico, and the nations of Central America. Readers will find reporting on health, environment, community resilience, and policy advances across the region.

Female scientist pipetting colored chemicals into a tube, for article on CAR T-cell therapy

Scientists hail autoimmune disease therapy breakthrough

Lupus remission in all five patients — that’s the striking result from a small German trial using CAR T-cell therapy, a treatment originally developed for blood cancers. Doctors collected each patient’s own T-cells, reprogrammed them to clear out the malfunctioning B cells driving the disease, and reinfused them. Months later, the patients’ immune systems had essentially rebooted: new B cells grew back, but they no longer attacked the body. None have needed lupus medication since. The lead researcher believes the same approach could help people with rheumatoid arthritis, multiple sclerosis, and other autoimmune conditions — opening a hopeful new chapter for millions worldwide who have long managed their illness without ever truly being free of it.